Upgrade project style

SourceGit/Converters/InverseBool.cs

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+using System;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace SourceGit.Converters {
+
+    /// <summary>
+    ///     Inverse bool converter.
+    /// </summary>
+    public class InverseBool : IValueConverter {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture) {
+            return !((bool)value);
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) {
+            throw new NotImplementedException();
+        }
+    }
+}